Wrinkle prediction of seat cover considering cyclic loading-unloading with viscoelastic characteristics

Oh, Jeong Seok; Kim, Dae Young; Kim, Heon Young; Lee, Chung An; Bang, Jun Ho; Choi, Kwon Yong

doi:10.1016/j.matdes.2016.07.040

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…This means that, after removing the load, the deformation starts to decrease, and completely disappears after a certain time-period. The visco-elastic or relaxation, creep properties of leather play a huge role in, for example, formation of wrinkles on leather seat covers under cyclic loading, see for example, [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Leather Visco-Elastic Behavior Based on Collagen Fiber-Bundle Properties and a Meso-Structure Network Model

et al. 2021

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Simulation-based prediction of mechanical properties is highly desirable for optimal choice and treatment of leather. Nowadays, this is state-of-the-art for many man-made materials. For the natural material leather, this task is however much more demanding due to the leather’s high variability and its extremely intricate structure. Here, essential geometric features of the leather’s meso-scale are derived from 3D images obtained by micro-computed tomography and subsumed in a parameterizable structural model. That is, the fiber-bundle structure is modeled. The structure model is combined with bundle properties derived from tensile tests. Then the effective leather visco-elastic properties are simulated numerically in the finite element representation of the bundle structure model with sliding contacts between bundles. The simulation results are validated experimentally for two animal types, several tanning procedures, and varying sample positions within the hide. Finally, a complete workflow for assessing leather quality by multi-scale simulation of elastic and visco-elastic properties is established and validated.

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Section: Introductionmentioning

confidence: 99%

Simulation of Leather Visco-Elastic Behavior Based on Collagen Fiber-Bundle Properties and a Meso-Structure Network Model

et al. 2021

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“…The load-deformation behavior of seat cushions is commonly evaluated in the manner described in the previous studies by Todd et al (1996), Dionne et al (1998), Smardzewski et al (2010), Oh et al (2016), and Li (2017), who all reference ASTM standard D3574-17 (2017), i.e., using a flat circular metal plate (20 cm in diameter) as the indenter for compressing cushions. The load-deformation behavior measured by using this standard procedure has led to the results being different from those experienced by the human subjects in the real sitting situation, because it was concluded that the sitting area is the most significant factor in evaluating human subject sitting (Swearingen et al 1962;Grujicic et al 2009;Smardzewski et al 2010;Smardzewski 2013).…”

Section: Introductionmentioning

confidence: 99%

Cushioning capability analysis of seat foundations considering the sitter’s anthropometric dimensions

Tor

Shen

et al. 2020

BioRes

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Sitting comfort is primarily determined by the cushioning capability of the seat foundation. Limited literature has been found related to the effects that different sized human buttocks had on the cushioning capability of the seat foundation. Moreover, there is no testing method specialized to measure the load-deformation behavior of foam cushions that imitates the sitting behavior between indenters with different sizes and seat support. This study investigated the effects of various indenter diameters (20 cm, 30 cm, 36 cm, 41 cm, 51 cm, and 58 cm), foam stiffness levels (high and low), and seat bases (spring versus solid flat panel) on the compressive load-deformation behavior of upholstered seat foundations. The load-deformation curves of all the tested foam-seat base combinations exhibited three typical regions, i.e., linear elasticity, plateau, and densification, when subjected to the loads applied through different indenter diameters. Statistical results indicated that the primary effects of the indenter diameter, foam stiffness level, and seat base had significant effects on the spring constants, which represented the slopes of lines in these three regions. In addition, a regression technique was proposed to derive power equations for the estimation of the spring constants of a seat foundation as a function of the indenter diameter, foam material stiffness, and seat base type.

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Advances in Creep Behaviors of Textile Composites

Yin,

Zhao,

Lin

et al. 2023

Appl Compos Mater

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Wrinkle prediction of seat cover considering cyclic loading-unloading with viscoelastic characteristics

Cited by 7 publications

References 11 publications

Simulation of Leather Visco-Elastic Behavior Based on Collagen Fiber-Bundle Properties and a Meso-Structure Network Model

Simulation of Leather Visco-Elastic Behavior Based on Collagen Fiber-Bundle Properties and a Meso-Structure Network Model

Cushioning capability analysis of seat foundations considering the sitter’s anthropometric dimensions

Advances in Creep Behaviors of Textile Composites

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